This amazing new gadget enables the bassoon to very easily play a low C# to D # (Db to Eb) trill - no more wiggling the fingers and hoping for the best!

The additional keywork is very easy to add to your bassoon just screw it onto the bassoon's C# key rod (see pictures for the placement) - there is no need to pay for an bassoon technician to fit this additional key. This key fits keywork that is no more than 4mm in diameter - the additional key can be filed to make it fit larger keywork.

Once you've attached it, simply play a low C, add the new key (C# key) and then just move your little finger up and down on the low Eb key.